JPS6146247B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a gear shaving machine.

In conventional gear shaving machines, the workpiece is mounted so that the axis of rotation of the workpiece is in the horizontal direction, and the workpiece is supported from both sides when the workpiece is rotatably supported. Therefore, there has been a problem in that it takes a lot of time and effort to attach the upper workpiece, which becomes large due to the rigidity balance of the device.

The present invention has been proposed in view of the above, and includes a work head protruding from the upper surface of the bed, a work gear formed at the upper end of the work head, a work gear rotatable relative to the bed, and a center axis of the rotation thereof. A workpiece mounting device mounted so as to face approximately vertically, a moving device movably placed on the top surface of the bed, a cutter mounting device attached to the moving device, and a combination of the cutter mounting device and the moving device. a rotating device that rotates the axis of a cutter interposed therebetween and attached to the cutter mounting device along a plane perpendicular to the moving direction of the moving device; A gear shaving machine characterized by comprising: a tilting device for tilting the work by moving the cutter; and a rack-type or pinion-type work cutter attached to the cutter attachment device and operated by receiving a driving force from the cutter attachment device and meshing with the workpiece gear. The main points are as follows.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2, a work head 2 is swingably attached to the bed 4 via a pin 6 and has an upper end protruding from the upper surface of the bed 4. As shown in FIGS.
A workpiece attachment part 8 is formed at the upper end of the workhead 2 in a state that it can rotate freely with respect to the workpiece head 2, and a workpiece gear 10 whose rotation center axis is along the substantially vertical direction is attached to the workpiece attachment part 8 by a clamp member (not shown). It is secured by a known collect chuck.

This collect chuck consists of an outer circumferential member to be expanded and a conical inner fitting member fitted into the outer circumferential member, and by moving the inner fitting member in the axial direction of the conical shape, the outer circumferential member can be expanded or This is to reduce the size of the outer circumferential member to the work gear 10.
The workpiece gear 10 is fixed by being fitted into the shaft hole of the workpiece gear 10. The inner fitting member of the above-mentioned collector chuck is a rod 14 attached to a piston of a rotary cylinder 12 (a hydraulic cylinder whose piston is rotatable relative to the cylinder) attached to the lower part of the work head 2.
The cylinder 12
When hydraulic pressure is supplied to the hydraulic chamber and the piston moves in the cylinder axis direction, the workpiece gear 10 is fixed to the workpiece attachment part 8. Reference numeral 16 denotes a gear 18, a worm gear that slowly rotates the rod 14 clockwise in FIG. Also, the bed 4 can be used as a tilting device.
A work head fixing pad 24 that engages with the engaging portion 22 of the work head 2 to determine the leftmost position of the lower end of the work head 2 in FIG. I am now able to do this. At the lower end of the work head 2, the engaging portion 22 of the work head 2 and the pad 24 do not come into contact when no external force is applied to the work head. The work head 2 is connected to the piston 28 of the hydraulic cylinder 26 via a rod 30, and when the oil chamber of the hydraulic cylinder 26 is supplied, the lower end of the work head 2 is connected to the piston 28 of the hydraulic cylinder 26.
It is biased to the left in the figure and held in a position where it abuts the pad 24. The position of the pad 24 differs depending on the specifications of the workpiece gear 10. That is, when shaving the workpiece gear 10, the workpiece mounting shaft is deflected in a direction perpendicular to the coaxial axis due to the cutting force, so the position of the pad 24 is determined in consideration of the amount of deflection to ensure shaving accuracy. be. Reference numeral 31 denotes a limit switch mounted on the bed 4. When the lower end of the work head 2 is slightly displaced to the right, the limit switch 31 comes into contact with the lower end and generates a signal to reverse the DC motor 36. There is. On the other hand, 32 is a feed base formed on the upper surface of the bed 4.
A carrier 34 is attached to form a moving device.

The carrier 34 can be moved left and right on the feed base 32 between the stoppers 33 and 35 by the driving force of a DC motor 36 provided on the feed base 32 and capable of forward and reverse rotation. The carrier 34 is adapted to be moved slowly to the left for shaving and rapidly reciprocated for movement by means of a switch (not shown).

The carrier 34 is composed of a pedestal 34' that is slidably engaged on the feed base 32, and a cutter head support 34'' that supports a cutter head 38 and a motor 42 for driving the cutter. The driving force to the pinion cutter 40 is transmitted by a gear train as shown by the broken line in FIG.

Furthermore, the cutter head support portion 34'' and the cutter head 38 are constructed with a rotating device that allows them to rotate at any desired angle about the drive shaft 42' of the motor 42 along the joint surface A in FIG. .

This is because when the workpiece gear 10 and the cutter gear 40 mesh, a slippage (shaving action) in the tooth trace direction is caused between the tooth surface of the workpiece gear 10 and the cutter cross section of the cutter gear 40. This is because the rotation axis of the work head 38 can be adjusted to an arbitrary angle by the helix angle of the teeth of the cutter gear 40 and the helix angle of the teeth of the cutter gear 40.

A cutter gear 40 is attached to the lower end of the cutter head 38 and has a rotation center axis extending in the vertical direction. A large number of grooves forming cutting edges are formed on the tooth surface of the cutter gear 40.

By the way, the position of the carrier 34 is detected by a detection mechanism (not shown), and the detection result of this detection mechanism cooperates with the on/off of the limit switch 31 to control the activation/deactivation of the motor 20 and the hydraulic pressure. It acts as a signal to control hydraulic pressure supply and discharge to the cylinder 26. Further, 44 is a mounting portion for a gear tooth profile/lead measuring device (not shown).

In the above configuration, when the workpiece gear 10 that has been hobbed is attached to the workpiece attachment part 8, the carrier 34 is located at the right position on the bed 4, and in this state, the workpiece gear 10 is attached to the workpiece attachment part 8. This is done by opening the hydraulic pressure supply circuit to the rotary cylinder 12 and operating the clamp member.

Next, based on the helix angle of the workpiece gear 10 and the helix angle of the cutter gear 40, when the workpiece gear 10 and the cutter gear 40 mesh, the gap between the tooth surface of the workpiece gear 10 and the tooth surface of the cutter gear 40 is determined. The work head 38 is rotated to an arbitrary inclination angle around the drive shaft 42' of the motor 42 at the joint surface between the rotary shaft of the cutter head 38 and the work head support portion 34'' so that sliding in the tooth trace direction occurs.

Next, when the motor 36 is activated, the carrier 34
moves to the left in a rapid traverse motion, and the cutter gear 40 approaches the workpiece gear 10. And the cut gear 4
0 moves to the position where it meshes with the work gear 10, when the tips of both gears are in contact with each other,
After the cutter gear 40 comes into contact with the cutter gear 40, the work head 2 swings counterclockwise as the cutter gear 40 moves to the left and comes into contact with the limit switch 31.

In this state, the motor 36 reverses and the carrier 34 starts moving rightward. Then, the cutter gear 40 moves to the right while maintaining contact with the work gear 10 until the work head 2 comes into contact with the pad 24, and then moves away from the work gear 10.
The carrier 34 reaches a position where it comes into contact with the stopper 35.

In this state, the motor 20 is operated by the output of the carrier position detection mechanism, and the workpiece gear 10 is rotated slowly clockwise. Then, when the carrier 34 starts moving leftward again, the operation of the motor 20 is stopped, and the rotation of the workpiece gear 10 is stopped. At this time, even though the work gear 10 has rotated, the work gear 10 and the cutter gear 4 still remain.
If the tips of the teeth are in contact with each other, the same operation as above will be repeated. On the other hand, when the rotation of the workpiece gear 10 allows the gear and the cutter gear 40 to mesh with each other, the tooth tip of the cutter gear 40 moves to the left beyond the contact position with the tooth tip of the workpiece gear 10. Even though I did it, the limit switch 3
1 does not operate, that is, when this condition is detected, the motor 36 stops operating and the carrier 3
4 is stopped at that position, while hydraulic pressure is supplied to the hydraulic cylinder 26, and the work head 2 is held at a position in contact with the pad 24. Next motor 4
2 is activated to rotate the cutter gear 40 and cause the carrier 34 to move slowly to the left, thereby shaving the tooth surface of the workpiece gear 10. This shaving operation is continued until the carrier 34 reaches the shaving end position where it comes into contact with the stopper 33.

According to the apparatus of this embodiment, the rotational center axes of the workpiece gear 10 and the cutter gear 40 are configured to face in the substantially vertical direction, so the entire shaving machine becomes compact, and since the workpiece gear is supported on a cantilever, the workpiece This has the effect that the work of attaching the gear to the work head 2 becomes extremely simple.

Further, the work head 2 is swingably supported on the bed 4, and the fixed position of the work head 2 during shaving is set by the pad 24 which is movable in the horizontal direction in FIG. In some cases, when the amount of deflection of the rod 14 or the like is large, uneven machining can be prevented by appropriately moving the position of the pad 24.

Further, due to the rocking operation of the work head 2 and the operation of the limit switch 31, the work gear 10
It is configured to detect a non-meshing state between the gear and the cutter gear 40 and automatically bring the gear into a state where it can be meshed.
The number of manual work processes has been greatly reduced.

In the above embodiment, the work head 38 to which the cutter gear 40 is attached is arranged above the cutter gear 40. Carrier 50 slides left and right due to the driving force of
It may be configured so that it is supported from below. In FIG. 3, the carrier 50 has a built-in motor (not shown) that drives the cutter gear 40, and the workpiece gear 10 is attached to a workpiece mounting portion (not shown) at the upper end of the workhead 52, which is rotatably attached to the bed 46. It is adapted to be attached via a clamp member. By the way, when operating the shaving machine of this second embodiment, when the cutter gear 40 is moved to the right after shaving the work gear 10 by the cutter gear 40, the two gears 10 and 40 must be at a position where the two gears 10 and 40 are not disengaged. If this is done, when the work gear 10 is replaced, the new work gear and the cutter gear will mesh quickly, and the machining time can be shortened.

Furthermore, as shown in the first and second embodiments, the shaving machine of the present invention has a simplified top surface shape and can be fitted with a gear tooth profile lead measuring device, so as shown in FIG. By attaching a measuring instrument body 56 having a linear encoder 54 to the top surface of the bed 46 and attaching a rotary encoder 58 to the lower end of the work head 52 and integrating the outputs of both encoders, it is possible to measure the tooth profile and lead of the work gear. . Therefore, it is possible to omit the step of mounting the workpiece gear on the measurement holder for new tooth profile/lead measurement after the shaving operation is completed. In FIG. 4, members having the same reference numerals as those in FIG. 3 are members having the same or substantially the same functions as the members described in FIG. 3.

Although each of the above embodiments uses a cutter gear (pinion type cutter), a rack type cutter which reciprocates above the bed in a substantially horizontal direction may also be used.

[Brief explanation of the drawing]

Fig. 1 is an elevation view showing a first embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an elevation view showing a second embodiment of the invention, and Fig. 4 is a third embodiment of the same. It is a perspective view showing an example. 2... Work head, 4... Bed, 8... Work attachment part, 10... Work gear, 34... Carrier, 38
...Cut head, 40...Cut gear, 46...Head, 50...Carrier, 52...Work head.

Claims (1)

[Claims] 1. A work head protruding from the upper surface of the bed, and a workpiece mounting device formed at the upper end of the work head and installed in such a way that a workpiece gear can rotate relative to the bed and its central axis of rotation faces approximately vertically. , a moving device movably placed on the upper surface of the bed, a cutter attachment device attached to the moving device, and a cutter interposed between the cutter attachment device and the moving device and attached to the cutter attachment device. a rotating device that rotates the axis of the workpiece in a direction perpendicular to the moving direction of the moving device; a tilting device that tilts the workpiece mounting device and the moving device along the moving direction; and a tilting device that is attached to the cutter mounting device and the same. A gear shaving machine comprising a rack-type cutter or a pinion-type cutter that operates by receiving driving force from a cutter attachment device and meshes with the workpiece gear.